1. CH. 1 The Nature of Chemistry
Essential Question:
What are the different steps of the Scientific Method and how do they work together?

2. The Central Science
Chemistry has been called the central science because it overlaps many other sciences.
Chemistry is the science that investigates and explains the structure and properrties of matter.
Science – an organized way of using evidence to learn about the natural word.
Observation – involves using one or more of the senses – sight, hearing, touch, smell, and sometimes taste to gather information.
Data – the information gathered from observations
Inference – a logical interpretation based on prior knowledge and experience.
Hypothesis – a possible explanation for a set of observations or an answer to a scientific question.

3. When a hypothesis has been tested many times and has never been disproven, it becomes a Theory.

4. Controlled Experiments
Experimental Variables
Manipulated (Independent) vs. Responding (Dependent)

5. Jack wants to find out which laundry detergent cleans the best
Jack wants to find out which laundry detergent cleans the best. So, he takes a cotton sheet and cuts it up into equal squares. He stains four squares with chocolate, and four with grape juice. He washes one of each of the squares in each of the 3 detergents. One from each set of squares is washed in water alone. For each wash load, he used: the same amount of water, the same amount of detergent, and the same water temperature.
Independent Variable:
Dependent Variable:
Control(s):
Constants:
Hypothesis: